Electroconvulsive Therapy


Article Author:
Irim Salik


Article Editor:
Raman Marwaha


Editors In Chief:
Sherri Murrell


Managing Editors:
Avais Raja
Orawan Chaigasame
Khalid Alsayouri
Kyle Blair
Radia Jamil
Erin Hughes
Patrick Le
Anoosh Zafar Gondal
Saad Nazir
William Gossman
Hassam Zulfiqar
Navid Mahabadi
Hussain Sajjad
Steve Bhimji
Muhammad Hashmi
John Shell
Matthew Varacallo
Heba Mahdy
Ahmad Malik
Abbey Smiley
Sarosh Vaqar
Mark Pellegrini
James Hughes
Beenish Sohail
Hajira Basit
Phillip Hynes
Sandeep Sekhon


Updated:
11/10/2019 7:02:58 PM

Introduction

In a patient under intravenous sedation or general anesthesia, electroconvulsive therapy (ECT) uses an electric current to create a generalized cerebral seizure. Although it is primarily utilized to treat patients with severe depression, patients with schizophrenia, schizoaffective disorder, catatonia, neuroleptic malignant syndrome, and bipolar disorder may also benefit. However, the practice has a stigma attached to it due to misinformation regarding procedural methodology. 

Anatomy

There are various pathophysiologic changes in brain regions found in patients with severe depression. These include reduced activity and volumetric reductions in the dorsal areas of the frontal lobes. Areas of the ventral and orbital frontal cortex have altered processing of emotional stimuli.[1] In addition to the frontal lobe, functional alterations and volumetric reductions are apparent in the hippocampus, parahippocampal gyri, and amygdala.[2] The hypothalamic-pituitary-adrenal (HPA) axis becomes hypersensitive to stressors, exhibits chronically elevated levels of stress hormones and impaired feedback regulation. [3] The mesocorticolimbic dopamine system, as well as the HPA axis, are activated in patients with stress. Dopamine function is thought to be impaired in patients with depression, causing impairment in essential functions including concentration, motivation, and pleasure.[4] The antidepressive effects of ECT reflect changes in the systems mentioned above.

Indications

ECT is indicated in patients with treatment-resistant depression or severe major depression that impairs activities of daily living. The definition of treatment-resistant depression is depression that is unresponsive to multiple antidepressant medication trials.[5] There are also suggestions for ECT as a treatment for suicidality, severe psychosis, food refusal secondary to depression, and catatonia.[6][7] Bipolar depressive and manic patients can also receive treatment with ECT.[8] ECT may have a safer profile than antidepressants or antipsychotics in debilitated, elderly, pregnant and breastfeeding patients. Suicidal ideation is rapidly relieved by ECT, and complete resolution was seen in 38% of patients after one week, 61% of patients after two weeks and in 81% of patients with completion of ECT.[9] ECT is also recommended for patients that have exhibited a favorable response to ECT previously. 

Contraindications

The resultant seizure from ECT can cause transient increases in blood pressure, myocardial oxygen consumption, heart rate, and intracranial pressure. Care is necessary for patients with cardiovascular, pulmonary, or central nervous system compromise. A pheochromocytoma and elevated intracranial pressure with mass effect are absolute contraindications to ECT. Relative contraindications include elevated intracranial pressure without mass effect, cardiovascular conduction defects, high-risk pregnancies, aortic and cerebral aneurysms.[10]

Equipment

ECT treatment and recovery areas should include the standard American Society of Anesthesiologists (ASA) monitors. A stethoscope, blood pressure monitor, electrocardiography (EKG) monitor, pulse oximeter, suction apparatus, and an oxygen delivery system should be present. Anesthetic induction supplies and medication should be available along with ventilatory and resuscitation equipment. A nasal cannula or face mask to provide supplemental oxygen, bag valve mask, nerve stimulator to assess neuromuscular blockade, electromyograph (EMG), electroencephalography (EEG) leads, and multiple blood pressure cuffs should be available.

Personnel

ECT is administered by a team that typically includes an anesthesiologist, a psychiatrist and a nurse. 

Preparation

A complete history and physical examination may expose significant risk factors including cardiac ischemia or arrhythmia, heart failure, or intracranial pathology.[11] History should also include the use of herbal medications such as Ginkgo biloba, ginseng, St. John's wort, valerian, and kava, all of which may interfere with ECT. There is a risk of status epilepticus in patients on theophylline.[12] Short-acting intravenous beta blockers may reduce ECT related hypertension and tachycardia, but may also shorten seizure duration and reduce ECT efficacy.  Cardiac medications including aspirin, statins, antihypertensive agents, antianginal medications, and clopidogrel should be continued the day of the procedure. Serum glucose levels require checking both preoperatively and in the recovery room, as ECT treatments can raise blood glucose levels. Although ECT appears to be safe in a patient with a defibrillator, detection mode should be turned off during the procedure and equipment for external defibrillation should be available at the patient’s bedside. In pregnant patients, noninvasive fetal monitoring is the recommendation after 14 to 16 weeks and a nonstress test with a tocometer after 24 weeks.

ECT utilizes general anesthesia. Anesthetic induction medications used include barbiturates such as thiopental and methohexital and nonbarbiturate agents such as propofol and etomidate. Seizure-induced by ECT should last longer than 30 seconds. Methohexital is the most commonly used induction agent due to its quick onset, effectiveness, low cost, and minimal effect on seizure duration. Propofol and thiopental have been shown to reduce seizure duration. Etomidate has correlations with myoclonus and increased seizure duration.

Technique

ECT is commonly performed in a dedicated suite, a post-anesthesia care unit, or an ambulatory surgery site, most frequently on an outpatient basis. Patients with severe debilitation including substantial medical or psychiatric illness may start on an inpatient basis and transition to an outpatient basis as needed. Patients should be appropriately nil per os (NPO) for the procedure, which includes no light meal for six hours, no full-fat meal for eight hours, and no clear liquids for two hours before anesthesia.

Vital signs, including blood oxygen saturation, ECG and EEG activity are recorded continuously. EMG is recorded on the right foot to measure the motor component of seizure activity. A nerve stimulator is utilized to monitor succinylcholine, a depolarizing muscle relaxant used to reduce tonic-clonic contractions during the procedure. As an alternative to EMG, a blood pressure cuff is inflated on the patient’s ankle to prevent succinylcholine from entering the foot, allowing a visual monitor of seizure activity with measurement of tonic-clonic contractions. Following intravenous induction, a bite block is placed to protect the patient’s tongue and teeth. The beginning and termination of a cerebral seizure is monitored via EEG, recorded from right and left frontal and mastoid positions. Seizure induction is via two electrodes placed bitemporally or a right unilateral electrode; both of which allow electrical current to pass into the scalp.[13] A 2017 meta-analysis of numerous randomized trials of 792 patients specifically compared moderate dose bilateral ECT with high dose right unilateral ECT, and remission was comparable.[14] Right unilateral ECT is utilized preferentially to minimize retrograde amnesia.

The ECT stimulus is either a brief pulse (0.5 to 2.0 milliseconds) or ultra-brief pulse (less than 0.5 milliseconds) waveform. While the brief pulse is considered standard, the ultra-brief is considered more tolerable.[15] Electricity dose affects efficacy, the speed of response, and adverse cognitive effects. Seizure threshold is established via trial and error via incrementally higher doses of current during the primary treatment session.[16][17] Following initial dose calculation, the dose at subsequent ECT sessions for bilateral ECT is 1.5 to 2 times seizure threshold, and for right unilateral is six times the seizure threshold. During a course of ECT treatment, the seizure threshold commonly increases as the patient develops tolerance.

As with any other procedure, the goal of the anesthesiologist during ECT is to facilitate a safe and pain-free experience for the patient.[18] Preoxygenation of the patient via nasal cannula or face mask is followed by anesthetic induction and paralysis. Administration of an anticholinergic medication before ECT may prevent arrhythmias such as bradycardia or asystole and excessive oral secretions. To induce cerebral vasoconstriction via hypocarbia, the patient is often hyperventilated via bag valve mask before delivery of the electrical stimulus to increase seizure intensity.[19]The gold standard for induction of anesthesia is methohexital, given at 0.75 to 1 mg/kg.[18] Methohexital is preferred to propofol because a meta-analysis of two randomized trials revealed that seizure duration was shorter with propofol.[20] Skeletal muscle relaxation during ECT is integral to minimize a motor seizure and avoid musculoskeletal injury. The depolarizing neuromuscular relaxant succinylcholine is used at 0.75 to 1 mg/kg with an elimination half-life of 41 seconds.[21][22]  In cases where succinylcholine is contraindicated including neuromuscular disease or injury, burn injury, pseudocholinesterase deficiency or hyperkalemia, nondepolarizing neuromuscular relaxants are the preferred option.[5]

Once the patient is rendered unconscious, administration of a muscle relaxant follows, along with bag valve mask ventilation with 100 percent oxygen. A nerve stimulator is utilized to determine the adequacy of muscle relaxation along with the clinical assessment of plantar reflexes and fasciculations in the calves and left foot. An inflated blood pressure cuff prevents muscle relaxant from entering the right foot. Muscle relaxants do not prevent masseter muscle contraction from the electrical pulse, requiring placement of a bite block for lingual and tooth protection.

Although most therapeutic ECT seizures last from 15 to 70 seconds, EEG recording lasts about 25 percent longer than the motor seizure.[23] Seizures lasting less than 15 seconds may not be clinically effective, while prolonged seizures may cause cognitive impairment. A missed or short seizure should have a follow-up with a short period of hyperventilation and restimulation with a higher electrical current. If a patient is experiencing a prolonged seizure greater than two minutes, an induction agent such as propofol or methohexital is either given at a half dose or a benzodiazepine, to suppress seizure activity and avoid neurologic injury. In a patient with numerous missed seizures,[24][12] anesthetic induction agents such as etomidate or ketamine may be useful as they exhibit less anticonvulsant effects as compared to methohexital. While caffeine had been previously administered to prolong seizures, it is no longer the recommendation due to its uncertain safety profile for this purpose.

In pregnant patients receiving ECT,[25][26] hyperventilation should be avoided as it can reduce placental blood flow causing fetal hypoxia. Minimization of NPO time and adequate intravenous fluid hydration is essential to avoid dehydration and premature uterine contractions. In a female with a gestational age greater than 20 weeks, left lateral uterine displacement is essential to optimize maternal venous return and maintain optimal uterine blood flow. In pregnancies greater than 24 weeks gestation considered viable, fetal heart rate and uterine activity should undergo continuous monitoring 30 minutes before and after each treatment by an obstetrician that can manage obstetric and neonatal emergencies. Because pregnant patients are at higher risk for aspiration pneumonitis due to their full stomach status, anticholinergic drugs that reduce lower esophageal sphincter tone should be avoided, as they can increase reflux.[27][25][28]  In this case, a nonparticulate antacid such as sodium citrate is safer for aspiration prophylaxis.

Complications

Bilateral or bitemporal ECT causes more cognitive impairment than unilateral ECT, although this effect is transient. A meta-analysis of 1415 depressed patients treated with ECT revealed that global cognition, verbal memory, and autobiographical memory were worse with bilateral treatment three days after treatment.[29]

According to the American Psychiatric Association, patients receiving ECT are at higher risk if they show evidence of unstable or severe cardiovascular disease, a space-occupying intracranial lesion with evidence of elevated intracranial pressure, history of an acute cerebral hemorrhage or stroke, an unstable vascular aneurysm, severe pulmonary disease, or qualify as American Society of Anesthesiologists (ASA) Class 4 or 5.

Physiologically, during the tonic phase of the seizure, a 15- to 20-second parasympathetic discharge occurs, which can lead to bradyarrhythmias including premature atrial and ventricular contractions, atrioventricular block, and asystole. Patients with subconvulsive seizures are at higher risk for asystole.[30] Paradoxically, patients with heart block or underlying arrhythmias are less likely to develop asystole. The clonic phase of the seizure correlates with a catecholamine surge that causes tachycardia and hypertension, which lasts temporally with seizure duration.[31] Hypertension and tachycardia resolve within 10 to 20 minutes of the seizure, although some patients exhibit persistent hypertension that requires medical intervention.

Although patients with cardiac disease at baseline are at higher risk following treatment, ejection fraction can decrease following ECT in healthy patients as well.[32] In a study of 53 adults undergoing ECT, seven developed new global left ventricular (LV) systolic dysfunction and eight developed regional wall motion abnormalities. [33] Of these patients, there were no adverse outcomes in patients with LV dysfunction. In a prospective cohort study of 100 subjects undergoing ECT, increased cardiac troponin levels were present in eight patients, with only two having other evidence of myocardial ischemia or infarction. [34] Cerebral blood flow and intracranial pressure both increase with ECT therapy. Clinically, patients may exhibit confusion, delirium, disorientation and memory loss. ECT is classified as a low-risk procedure by the AHA-ACC guidelines because it is well tolerated, and demonstrates only transient hemodynamic lability and low mortality rate. [35][36][37]

Clinical Significance

ECT is a relatively safe and low-risk procedure that is helpful in the treatment of depression, suicidality, severe psychosis, food refusal secondary to depression, and catatonia. It requires interprofessional care coordination among anesthesiologists, psychiatrists, and nurses. Most patients require several sessions to see a durable effect. The stigma associated with ECT is largely due to the lack of anesthesia with early treatments resulting in significant injury and severe memory loss.  The antidepressant effect is seen relatively quickly and may last up to a few years. Overall, the mortality rate is very low with ECT administered in a controlled setting, but it continues to cause mild memory loss in the long term. ECT is commonly utilized in pregnant patients and the elderly due to the avoidance of psychotropic medication side effects. Although its mechanism of action is multifactorial, ECT causes changes in cerebral blood flow and regional metabolism. 

Enhancing Healthcare Team Outcomes

Today ECT is now frequently used to treat a variety of mental health disorders besides depression. The procedure is relatively safe, and does work. However, the delivery of ECT requires an interprofessional team that includes a nurse, anesthesiologist, psychiatrist and a neurologist. The benefits of ECT are seen after several sessions and the results are durable. The key is to educate the patient and family about ECT because the procedure has been associated with many false and illogical beliefs. The antidepressant effect is seen relatively quickly and may last up to a few years. Overall, the mortality rate is very low with ECT administered in a controlled setting, but it continues to cause mild memory loss in the long term. ECT is commonly utilized in pregnant patients and the elderly due to the avoidance of psychotropic medication side effects. Although its mechanism of action is multifactorial, ECT causes changes in cerebral blood flow and regional metabolism. Most patients who undergo ECT have a beneficial response without any adverse sequelae. [38](Level V)


Interested in Participating?

We are looking for contributors to author, edit, and peer review our vast library of review articles and multiple choice questions. In as little as 2-3 hours you can make a significant contribution to your specialty. In return for a small amount of your time, you will receive free access to all content and you will be published as an author or editor in eBooks, apps, online CME/CE activities, and an online Learning Management System for students, teachers, and program directors that allows access to review materials in over 500 specialties.

Improve Content - Become an Author or Editor

This is an academic project designed to provide inexpensive peer-reviewed Apps, eBooks, and very soon an online CME/CE system to help students identify weaknesses and improve knowledge. We would like you to consider being an author or editor. Please click here to learn more. Thank you for you for your interest, the StatPearls Publishing Editorial Team.

Electroconvulsive Therapy - Questions

Take a quiz of the questions on this article.

Take Quiz
A 67-year-old male with benign prostatic hyperplasia, well-controlled hypertension, and erectile dysfunction presents with acute-onset depression. His medications are tamsulosin, lisinopril, and sildenafil. Upon questioning, he has suicidal ideation, a plan, and means to carry out the plan. Following a full, in-hospital psychiatric evaluation, and a home risk evaluation, it is decided that treatment is warranted. What is the best next step in treating this patient?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Electroconvulsive therapy (ECT) is absolutely contraindicated in the presence of which condition?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Which is NOT associated with electroconvulsive therapy?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A 41-year-old patient undergoes unilateral electroconvulsive therapy for depression. After the procedure, post anesthesia what is recommended for providers to do?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Which of the following is least likely after electroconvulsive therapy?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Which of the following conditions is least responsive to electroconvulsive therapy (ECT)?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Electroconvulsive therapy is not recommended for which psychiatric disorder?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A female with long-standing depression is now scheduled for electroconvulsive therapy after failing to respond to medications. She would like to know the leading cause of mortality following this therapy. What should she be told?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A 67-year-old woman who has been suffering from chronic major depression that has become resistant to pharmacotherapy has agreed to explore electroconvulsive therapy (ECT) to help decrease her symptoms. While obtaining informed consent from this patient, which condition should be mentioned as a commonly reported serious adverse effect of ECT?



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
Patients with which of the following conditions might benefit from electroconvulsive therapy? Select all that apply.



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient is undergoing electroconvulsive therapy for major depressive disorder. What are fundamental principles that will guide care for this patient? Select all that apply.



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
A patient is scheduled to undergo electroconvulsive therapy for major depressive disorder. The patient would like to know the adverse effects of the treatment. The nurse will explain to the patient that they may develop impairment in which of the following? Select all that apply.



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up
You are in the behavioral health unit where the physician frequently uses electroconvulsive therapy (ECT) as treatment. Which of the following conditions can be treated with this therapy? Select all that apply.



Click Your Answer Below


Would you like to access teaching points and more information on this topic?

Improve Content - Become an Author or Editor and get free access to the entire database, free eBooks, as well as free CME/CE as it becomes available. If interested, please click on "Sign Up" to register.

Purchase- Want immediate access to questions, answers, and teaching points? They can be purchased above at Apps and eBooks.


Sign Up

Electroconvulsive Therapy - References

References

Mayberg HS,Lewis PJ,Regenold W,Wagner HN Jr, Paralimbic hypoperfusion in unipolar depression. Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 1994 Jun;     [PubMed]
Botteron KN,Raichle ME,Drevets WC,Heath AC,Todd RD, Volumetric reduction in left subgenual prefrontal cortex in early onset depression. Biological psychiatry. 2002 Feb 15;     [PubMed]
de Kwaasteniet B,Ruhe E,Caan M,Rive M,Olabarriaga S,Groefsema M,Heesink L,van Wingen G,Denys D, Relation between structural and functional connectivity in major depressive disorder. Biological psychiatry. 2013 Jul 1;     [PubMed]
Rigucci S,Serafini G,Pompili M,Kotzalidis GD,Tatarelli R, Anatomical and functional correlates in major depressive disorder: the contribution of neuroimaging studies. The world journal of biological psychiatry : the official journal of the World Federation of Societies of Biological Psychiatry. 2010 Mar;     [PubMed]
The Practice of ECT: Recommendations for Treatment, Training and Privileging. Convulsive therapy. 1990 Jun;     [PubMed]
Husain MM,Rush AJ,Fink M,Knapp R,Petrides G,Rummans T,Biggs MM,O'Connor K,Rasmussen K,Litle M,Zhao W,Bernstein HJ,Smith G,Mueller M,McClintock SM,Bailine SH,Kellner CH, Speed of response and remission in major depressive disorder with acute electroconvulsive therapy (ECT): a Consortium for Research in ECT (CORE) report. The Journal of clinical psychiatry. 2004 Apr;     [PubMed]
Kellner CH,Knapp R,Husain MM,Rasmussen K,Sampson S,Cullum M,McClintock SM,Tobias KG,Martino C,Mueller M,Bailine SH,Fink M,Petrides G, Bifrontal, bitemporal and right unilateral electrode placement in ECT: randomised trial. The British journal of psychiatry : the journal of mental science. 2010 Mar;     [PubMed]
Fink M, Indications for the use of ECT. Psychopharmacology bulletin. 1994;     [PubMed]
Kellner CH,Fink M,Knapp R,Petrides G,Husain M,Rummans T,Mueller M,Bernstein H,Rasmussen K,O'connor K,Smith G,Rush AJ,Biggs M,McClintock S,Bailine S,Malur C, Relief of expressed suicidal intent by ECT: a consortium for research in ECT study. The American journal of psychiatry. 2005 May;     [PubMed]
Taylor S, Electroconvulsive therapy: a review of history, patient selection, technique, and medication management. Southern medical journal. 2007 May;     [PubMed]
Tess AV,Smetana GW, Medical evaluation of patients undergoing electroconvulsive therapy. The New England journal of medicine. 2009 Apr 2;     [PubMed]
Devanand DP,Decina P,Sackeim HA,Prudic J, Status epilepticus following ECT in a patient receiving theophylline. Journal of clinical psychopharmacology. 1988 Apr;     [PubMed]
Bjølseth TM,Engedal K,Benth JŠ,Dybedal GS,Gaarden TL,Tanum L, Clinical efficacy of formula-based bifrontal versus right unilateral electroconvulsive therapy (ECT) in the treatment of major depression among elderly patients: a pragmatic, randomized, assessor-blinded, controlled trial. Journal of affective disorders. 2015 Apr 1;     [PubMed]
Kolshus E,Jelovac A,McLoughlin DM, Bitemporal v. high-dose right unilateral electroconvulsive therapy for depression: a systematic review and meta-analysis of randomized controlled trials. Psychological medicine. 2017 Feb;     [PubMed]
Sienaert P,Spaans HP,Kellner CH, Pulse Width in Electroconvulsive Therapy: How Brief Is Brief? The journal of ECT. 2018 Jun;     [PubMed]
Petrides G,Fink M, The     [PubMed]
Petrides G,Braga RJ,Fink M,Mueller M,Knapp R,Husain M,Rummans T,Bailine S,Malur C,O'Connor K,Kellner C, Seizure threshold in a large sample: implications for stimulus dosing strategies in bilateral electroconvulsive therapy: a report from CORE. The journal of ECT. 2009 Dec;     [PubMed]
Bryson EO,Aloysi AS,Farber KG,Kellner CH, Individualized Anesthetic Management for Patients Undergoing Electroconvulsive Therapy: A Review of Current Practice. Anesthesia and analgesia. 2017 Jun;     [PubMed]
Bergsholm P,Gran L,Bleie H, Seizure duration in unilateral electroconvulsive therapy. The effect of hypocapnia induced by hyperventilation and the effect of ventilation with oxygen. Acta psychiatrica Scandinavica. 1984 Feb;     [PubMed]
Lihua P,Su M,Ke W,Ziemann-Gimmel P, Different regimens of intravenous sedatives or hypnotics for electroconvulsive therapy (ECT) in adult patients with depression. The Cochrane database of systematic reviews. 2014 Apr 11;     [PubMed]
Bryson EO,Kellner CH,Li EH,Aloysi AS,Majeske M, Extreme variability in succinylcholine dose for muscle relaxation in electroconvulsive therapy. Australasian psychiatry : bulletin of Royal Australian and New Zealand College of Psychiatrists. 2018 Aug;     [PubMed]
Torda TA,Graham GG,Warwick NR,Donohue P, Pharmacokinetics and pharmacodynamics of suxamethonium. Anaesthesia and intensive care. 1997 Jun;     [PubMed]
Mayur PM,Gangadhar BN,Janakiramaiah N,Subbakrishna DK, Motor seizure monitoring during electroconvulsive therapy. The British journal of psychiatry : the journal of mental science. 1999 Mar;     [PubMed]
Datto C,Rai AK,Ilivicky HJ,Caroff SN, Augmentation of seizure induction in electroconvulsive therapy: a clinical reappraisal. The journal of ECT. 2002 Sep;     [PubMed]
Miller LJ, Use of electroconvulsive therapy during pregnancy. Hospital     [PubMed]
Rabheru K, The use of electroconvulsive therapy in special patient populations. Canadian journal of psychiatry. Revue canadienne de psychiatrie. 2001 Oct;     [PubMed]
Yonkers KA,Wisner KL,Stowe Z,Leibenluft E,Cohen L,Miller L,Manber R,Viguera A,Suppes T,Altshuler L, Management of bipolar disorder during pregnancy and the postpartum period. The American journal of psychiatry. 2004 Apr;     [PubMed]
Anderson EL,Reti IM, ECT in pregnancy: a review of the literature from 1941 to 2007. Psychosomatic medicine. 2009 Feb;     [PubMed]
Semkovska M,Keane D,Babalola O,McLoughlin DM, Unilateral brief-pulse electroconvulsive therapy and cognition: effects of electrode placement, stimulus dosage and time. Journal of psychiatric research. 2011 Jun;     [PubMed]
Kaufman KR, Asystole with electroconvulsive therapy. Journal of internal medicine. 1994 Mar;     [PubMed]
Larson G,Swartz C,Abrams R, Duration of ECT-induced tachycardia as a measure of seizure length. The American journal of psychiatry. 1984 Oct;     [PubMed]
Fuenmayor AJ,el Fakih Y,Moreno J,Fuenmayor AM, Effects of electroconvulsive therapy on cardiac function in patients without heart disease. Cardiology. 1997 May-Jun;     [PubMed]
McCully RB,Karon BL,Rummans TA,Black JL,Andreen KM,Oh JK,Seward JB,Tajik AJ, Frequency of left ventricular dysfunction after electroconvulsive therapy. The American journal of cardiology. 2003 May 1;     [PubMed]
Duma A,Pal S,Johnston J,Helwani MA,Bhat A,Gill B,Rosenkvist J,Cartmill C,Brown F,Miller JP,Scott MG,Sanchez-Conde F,Jarvis M,Farber NB,Zorumski CF,Conway C,Nagele P, High-sensitivity Cardiac Troponin Elevation after Electroconvulsive Therapy: A Prospective, Observational Cohort Study. Anesthesiology. 2017 Apr;     [PubMed]
Zielinski RJ,Roose SP,Devanand DP,Woodring S,Sackeim HA, Cardiovascular complications of ECT in depressed patients with cardiac disease. The American journal of psychiatry. 1993 Jun;     [PubMed]
Rice EH,Sombrotto LB,Markowitz JC,Leon AC, Cardiovascular morbidity in high-risk patients during ECT. The American journal of psychiatry. 1994 Nov;     [PubMed]
Abrams R, The mortality rate with ECT. Convulsive therapy. 1997 Sep;     [PubMed]
Benson NM,Seiner SJ,Bolton P,Fitzmaurice G,Meisner RC,Pierce C,Busch AB, Acute Phase Treatment Outcomes of Electroconvulsive Therapy in Adolescents and Young Adults. The journal of ECT. 2018 Dec 18     [PubMed]

Disclaimer

The intent of StatPearls is to provide practice questions and explanations to assist you in identifying and resolving knowledge deficits. These questions and explanations are not intended to be a source of the knowledge base of all of medicine, nor is it intended to be a board or certification review of Nurse-Elder Adult Care. The authors or editors do not warrant the information is complete or accurate. The reader is encouraged to verify each answer and explanation in several references. All drug indications and dosages should be verified before administration.

StatPearls offers the most comprehensive database of free multiple-choice questions with explanations and short review chapters ever developed. This system helps physicians, medical students, dentists, nurses, pharmacists, and allied health professionals identify education deficits and learn new concepts. StatPearls is not a board or certification review system for Nurse-Elder Adult Care, it is a learning system that you can use to help improve your knowledge base of medicine for life-long learning. StatPearls will help you identify your weaknesses so that when you are ready to study for a board or certification exam in Nurse-Elder Adult Care, you will already be prepared.

Our content is updated continuously through a multi-step peer review process that will help you be prepared and review for a thorough knowledge of Nurse-Elder Adult Care. When it is time for the Nurse-Elder Adult Care board and certification exam, you will already be ready. Besides online study quizzes, we also publish our peer-reviewed content in eBooks and mobile Apps. We also offer inexpensive CME/CE, so our content can be used to attain education credits while you study Nurse-Elder Adult Care.